Question

what is the valency of

i) Sulphur in S02

ii) Phosphorous in P2O5

ATOMS AND MOLECULES

Answer 1

1.Sulphur =4
2.phosphorus =5
HOPE THIS HELPS!

Answer 2

In $SO_{2}$, the valency of sulphur is 4. 
In $P_{2}O_{5}$, the valency of phosphorus is 5. 

Hope this may help you.